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                [Wf2016]Longest Rivers                </h1>
                <p>时间限制：100s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：1024MB</p>			</div>
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                                <h3>题目描述</h3><p><div>有n条河流的发源地，有m个汇合点，每个汇合点都有若干条河流汇合，最后所有的河流汇合到一个点。给每个河流</div>
<div>定义一个长度，即从汇合终点开始，遇到分叉即只保留一条主干，剩下的都是支流。现在对于每条河流询问最好可</div>
<div>能的排名。n,m&lt;=500000。</div>
<div></div></p><hr/><h3>输入格式</h3><p><div>第一行包含两个整数n(1&lt;n&lt;=500000)代表河流源头数，m(0&lt;=m&lt;n)表示汇合点数，这些汇合点被标号为1~m。</div>
<div>接下来n行描述河流，每行包含一个字符串（长度不超过10），表示河流源头的名字，</div>
<div>然后有两个整数c(0&lt;=c&lt;=m)和d(1&lt;=d&lt;=10^9)，c表示离其最近的河流下游交汇处的标号，d是到交汇处的距离。</div>
<div>最后m行描述交汇点1~m。每行两个数该交汇点下游最近的交汇点和距离。</div></p><hr/><h3>输出格式</h3><p><p>输出n行，每行输出河流的名字和最高的可能排名。</p></p><hr/><h3>样例输入</h3><pre>6 3
Chi 1 1047
Mekong 2 2650
Mun 1 800
Nan 3 710
Salween 0 2815
Yom 3 787
2 100
0 1700
0 30
</pre><hr/><h3>样例输出</h3><pre>Chi 1
Mekong 1
Mun 3
Nan 6
Salween 1
Yom 4
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>鸣谢Yts1999上传，lbn187提供译文</p>
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